IPEX VKD Series Ball Valves offer a variety of advanced features such as the patented seat stop carrier, a high quality stem and ball support system, and a multifunctional handle with optional lock. The new DUAL BLOCK system locks the union nuts preventing back-off due to vibration or thermal cycling. Deep grooves, thick o-rings, and cushioned Teflon seats contribute to strong seals under pressure while integral mounting features and bracketing combine for simple adaptation for actuation and anchoring. Pressure rated to 232 PSI at 73°F. Sizes 3/8" to 4".Duraplus is made from a specially formulated acrylonitrile copolymer, exhibiting high impact strength, outstanding ductility, broad chemical resistance and long-term UV resistance at operating temperatures from -40°F to 158°F, and pressures from 75 to 230 psi (rated at 73ºF). Half the weight of copper and one-sixth the weight of steel pipe, Duraplus is easy to handle and simple to install using DuraplusTM solvent cement. Extruded pipe and dimensionally matched molded fittings and valves are available from 3/8" to 12".